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案例問題
某攪拌機上的觸摸控制器,通過用手指觸碰觸摸面板/外殼表面來操作,就像沒有按鍵的手機觸摸屏。觸摸控制器的彈簧和電極未與220V電源隔離,被視為“帶電部件”。彈簧在安裝前的原始長度為15mm,由于觸摸面板/外殼裝配壓緊后彈簧減小到10mm。
問題:攪拌機的觸摸面板/外殼是“支撐”彈簧和電極(帶電部件)還是只是“接觸”電極?是否應該根據IEC 60335-1第30.1條支撐帶電部件的部件進行125℃±2℃球壓試驗?
(圖1 攪拌機上的觸摸控制器,帶電彈簧在安裝后被壓緊)
案例分析
2020年12月IEC/TC61國際電工委員會第61家用電器技術委員會網絡全體會議討論了這個問題,詳見附件。
附件:
IEC/TC61 2020web meeting-AG 28 report
Reference
參考號
Date日期
Provided to提交至
CN-01_(Webmeetings 2020)
2020.5.24
IEC/TC61 AG28
Standard標準
Subclause(s)條款
Keywords、關鍵詞
IEC 60335-1:2016 Ed5.2
30.1
- Touch control
觸摸控制器
- Support live part
支撐帶電部件
Question
問題
A touch control on a blender shown in Figure 1a, is operated by the finger touch on the surface of the touch panel/enclosure to “switch-on” the control (Figure 1b) like it is for no-button-cell phone screen, rather than a push-push button.
The spring and electrode of touch control are not insulated from 220V mains, and are regarded as “live parts”.
The original length of the spring before installation is 15mm, reduced to 10mm after the touch panel/enclosure is assembled (Figure 2).
圖1a是一款攪拌機上的觸摸控制器,通過用手指放在觸摸面板/外殼表面來操作“接通”控制器(圖1b),就像沒有按鍵的手機觸摸屏,而不是一個按鈕開關。
觸摸控制器的彈簧和電極未與220V電源隔離,被視為“帶電部件”。
彈簧在安裝前的原始長度為15mm,由于觸摸面板/外殼裝配后壓緊彈簧減小到10mm。(圖2)
Note: the length of the live spring is 10 mm after the end-product is assembled
注:帶電彈簧的長度在最終產品組裝后為10mm。
Figure1a - touch control
圖1a 觸摸控制器
Figure1b – Fi
圖1b
Note: the length of the live spring is 15 mm before it is assembled.
彈簧在安裝前的原始長度為15mm。
Figure2 touch control
圖2 觸摸控制器
Key
1:PCB board connected with the spring by soldering
2:live spring
3: live electrode connected with the spring by mechanical connection
4: touch panel/enclosure (accessed by user’s finger)
F1: force applied by touch panel/enclosure
F2: force applied by the spring and electrode
關鍵
1:PCB板通過錫焊連接彈簧
2:帶電彈簧
3:電極通過機械方式連接彈簧
4:觸摸面板/外殼(用戶手指可觸及)
F1:觸摸面板/外殼施加的力
F2:彈簧和電極施加的力
Figure 3 - contruction of the touch control
圖3 觸摸面板/外殼被拆除前后
Question: as far as ball pressure test of the touch panel/enclosure according to clause 30.1 of IEC 60335-1is concerned, does the touch panel/enclosure “support” the electrode (live part) or just “touches” the electrode?
The key argue point is whether the touch panel/enclosure presses the electrode from top to bottom could be “regarded” as if the enclosure “supports” the electrode.
Opinion1: No, it is “contact” not “support”, it is the PCB board which “supports” the spring and electrode live parts, rather than the enclosure. The ball pressure test at 125 °C ± 2 °C, for parts supporting live parts is not applicable.
Opinion2: Yes. It is hard to understand how can a part “support” another part from top to bottom, however, just put the blender appliance up-side-down to imagine, see figure 4. It is obvius that the spring–electrode-live parts are supported by the PCB and touch panel/enclosure at the same time.If the enclosure is removed, the spring and electrode will not remain in original place and will move 5 mm. So ball pressure test at 125 °C ± 2 °C, for parts supporting live parts is applicable.
問題:就根據IEC 60335-1的30.1條款的控制面板/外殼的球壓試驗而言,控制面板/外殼是“支撐”電極(帶電部件) 還是只是“接觸”電極?
關鍵的爭論點是:控制面板/外殼從上往下壓住電極是否可以被“視為”支撐電極部件?
觀點1 不,是“接觸”而不是“支撐”,是PCB板“支撐”了彈簧和電極帶電部件,而不是外殼。對支撐帶電部件125℃±2℃的球壓試驗不適用。
觀點2 是,很難理解一個部件如何從上往下“支撐” 另一個部件,但是,只需將攪拌機器具上下顛倒即可想象,如圖4所示。很明顯彈簧-電極-帶電部件同時被PCB板和觸摸面板/外殼支撐。 如果外殼被拆除,彈簧和電極將不能保持在原來位置,將會移動5mm,所以對支撐帶電部件125℃±2℃的球壓試驗適用。
Figure 4 - force analysis (figure 3 up-side-down)
圖4-受力分析(圖3上下顛倒)
Which opinion is correct?
哪個觀點是正確的?
AG 28 Answer
主席顧問組AG28回復
It is considered that the touch panel/enclosure is supporting the live part.
It shall be noted that "support" in this context is not limited to the effects of gravity, but is also applicable to the consistent and reliable placement and location of the live part within the appliance. Of the three options for determining whether a ball pressure test is required (external parts, support live parts, supplementary/reinforced insulation), it is the only option that addresses this context.
觸摸面板/外殼應該被認為是支撐帶電部件。
值得注意的是在這個案例中“支撐”不應只局限于考慮重力的影響,也應適用于器具中保持帶電部件永久可靠安置在位的情況。在決定球壓試驗被要求的三個選項中(外部部件,支撐帶電部件,附加/加強絕緣),基于這次的案例情況這是唯一的選項。
TC61 DecisionTC61決議
Confirmed.
確認
標準條款
IEC 60335-1:2016 Ed5.2《家用和類似用途電器的安全 第1部分:通用要求》標準
參考譯文:
30.1 對于非金屬材料制成的外部部件、用來支撐帶電部件(包括連接)的非金屬材料部件以及提供附加絕緣或加強絕緣的材料的熱塑材料部件,其惡化可導致器具不符合本部分,應充分耐熱。
本要求不適用于軟線或內部布線的絕緣或護套。
通過按 IEC 60695-10-2 對有關的部件進行球壓試驗檢查其符合性。
該試驗在烘箱內進行,烘箱溫度為 40℃±2℃加上第 11 章試驗期間確定的最大溫升,但該溫度應至少:
——對外部部件 為:75℃±2℃。
——對支撐帶電部件的部件為:125℃±2
然而,對提供附加絕緣或加強絕緣的熱塑材料部件,該試驗在 25℃±2℃加上第 19 章試驗期間確定的最高溫升的溫度下進行(如果此值是較高的話)。只要 19.4 的試驗是通過非自復位保護裝置的動作而終止的,并且必須取下蓋子或使用工具去復位它,則不考慮其 19.4 的溫升。
注 1:對線圈骨架,只有那些用來支撐或保持接線端子在位的部件才經受該試驗。
注 2:該試驗不在陶瓷部件上進行。
注 3:耐熱試驗的選樣或程序如圖 O.1 所示。
來源:Internet